/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.grails.compiler.web.async

import java.lang.reflect.Method

import groovy.transform.CompileStatic

import org.springframework.transaction.PlatformTransactionManager
import org.springframework.transaction.annotation.Transactional

import grails.async.services.TransactionalPromiseDecorator

/**
 * Utility methods for use by Async transformations
 *
 * @author Graeme Rocher
 * @since 2.3
 */
@CompileStatic
class TransactionalAsyncTransformUtils {

    /**
     * Creates a {@link TransactionalPromiseDecorator} for the given transactionManager and method to be invoked
     *
     * @param transactionManager The transactionManager
     * @param method The method
     * @return A TransactionalPromiseDecorator
     */
    static TransactionalPromiseDecorator createTransactionalPromiseDecorator(PlatformTransactionManager transactionManager, Method method) {
        if (method) {
            final Transactional txAnn = method.getAnnotation(Transactional)
            if (txAnn) {
                return new TransactionalPromiseDecorator(transactionManager, txAnn)
            }
        }
        return new TransactionalPromiseDecorator(transactionManager)
    }
}
